Not quite true. The refineries will blend in the additives in the desired amounts for each company they bottle for. So if you and I were both selling oil under our own brand names I could elect to add just enough of the required additives to achieve minimum standards while you could elect not only to go over say 10% for better protection but you may chose to put in other optional additives that I don't. Sure I can either sell for less or have a greater profit margin but in the end my customers who wish to get the max usage out of their vehicle/lawn mower/tractor don't get the extended life they would have gotten had they purchased your oil. That info comes from a petro chemical engineer I went to high school with. I'll take his word for it. I was visiting with him just yesterday as he's in the area on vacation.
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Today's Featured Article - Uncle Cecil's Super A Lives Again - by Mike Purcell. A week or so out of most of my childhood summers was often spent with my Uncle Cecil and Aunt Sissie in the small East Texas town of Maydelle on their 80 acre farm. Some of my fondest memories of these visits are those of learning to drive a tractor at the helm of Uncle Cecil’s 1948 Farmall Super A. Uncle Cecil was the second owner of this wonderful little tractor, but it was almost as though he had adopted an infant. The original owner was a man from Minnesota who bought her from a local dea
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